Unpacking Argument Lists

今天偶然间看到了代码中有一个操作，就是在list前面加*，我搜了下这个用法，它意思是把list中的元素全部取出来，作为参数传到函数中，下面是官方的说明

The reverse situation occurs when the arguments are already in a list or tuple but need to be unpacked for a function call requiring separate positional arguments. For instance, the built-in range() function expects separate start and stop arguments. If they are not available separately, write the function call with the *-operator to unpack the arguments out of a list or tuple:

>>> range(3, 6)             # normal call with separate arguments
[3, 4, 5]
>>> args = [3, 6]
>>> range(*args)            # call with arguments unpacked from a list
[3, 4, 5]